gogotchiya83
2011-01-24, 12:41 AM
Find attached introducing the Best Practices for the 3G Optimization (E******* vendor) :
3 PILOT CHANNEL FAILURE - HIGH DOWNLINK INTERFERENCE
3.1 SYMPTOMS
3.2 REASON 1 – NO DOMINANT CELL
3.3 REASON 2 – DOMINANT INTERFERER
3.4 REASON 3 – LOW BEST SERVING PPILOT/PTOT
4 PILOT CHANNEL FAILURE - OUT OF PILOT COVERAGE
4.1 REASON 1 – LOW PILOT CHANNEL POWER.
5 PILOT POLLUTION
5.1 SYMPTOMS
5.2 REASON – NO DOMINANT CELL
6 UPLINK AND PILOT COVERAGE IMBALANCE
6.1 SYMPTOMS
6.2 REASON 1 – LARGE PILOT CHANNEL POWER
6.3 REASON 2 – HIGH UE TX POWER RESTRICTION
7 TRANSMITTING MAX DL CODE POWER – FULL COVERAGE
7.1 SYMPTOMS
7.2 REASON – LOW MAXIMUM ALLOWED DL CODE POWER
8 TRANSMITTING MAX DL CODE POWER – NOT FULL COVERAGE
8.1 SYMPTOMS
8.2 REASON – DOWNLINK POWER DRIFT
9 INSUFFICIENT RECEIVED UL DPCH POWER
9.1 SYMPTOMS
9.2 REASON – LOW MAXIMUM ALLOWED UL SIR TARGET
10 RAPIDLY CHANGING RADIO ENVIRONMENT
10.1 REASON – UL OUTER LOOP POWER CONTROL PROBLEM
11 UNEVEN LOAD DISTRIBUTION
11.1 REASON 1 – HOMOGENOUS PILOT SETTING IN AN IRREGULAR NETWORK
11.2 REASON 2 – UNWANTED LARGE CELL COVERAGE
11.3 REASON 3 – UNEVEN PILOT POWER
12 HIGH DOWNLINK TX POWER.
12.1 SYMPTOMS.
12.2 REASON – MANY USERS IN SOFT/SOFTER HANDOVER.
13 HIGH UPLINK RSSI
13.1 SYMPTOMS.
13.2 REASON – HIGH MINIMUM ALLOWED UL SIR TARGET.
14 MANY DOWN-SWITCHES DUE TO COVERAGE TRIGGERING.
14.1 SYMPTOMS.
14.2 REASON – DOWNLINK DPCH AND PILOT COVERAGE IMBALANCE.
15 HIGH FACH USAGE
15.1 SYMPTOMS.
15.2 REASON 1 – IMPROPER UP-SWITCH THRESHOLDS.
15.3 REASON 2 - IMPROPER DOWN-SWITCH TIMER SETTING.
16 HIGH SWITCHING RATES BETWEEN DEDICATED AND COMMON CHANNELS
16.1 SYMPTOMS.
16.2 REASON 1 - IMPROPER UP-SWITCH THRESHOLDS.
16.3 REASON 2 - IMPROPER DOWN-SWITCH THRESHOLD
17 LOW DATA THROUGHPUT.
17.1 SYMPTOMS..
17.2 REASON 1 – POOR RADIO LINK QUALITIES
17.3 REASON 2 – MANY DOWN-SWITCHES DUE TO COVERAGE TRIGGERING
17.4 REASON 3 - HIGH FACH USAGE
17.5 REASON 4 - HIGH SWITCHING RATES BETWEEN DEDICATED AND COMMON CHANNELS.
18 HANDOVER EVENT DETECTION FAILURE.
18.1 REASON 1 – POOR UPLINK QUALITY
18.2 REASON 2 – INCORRECT HANDOVER SERIES
18.3 REASON 3 - MISSING NEIGHBORING RELATIONSHIP.
18.4 REASON 4 – IMPROPER CELL INDIVIDUAL OFFSET SETTING.
18.5 REASON 5 – SMALL SOFT HANDOVER AREA
19 HANDOVER FUNCTION FAILURE
19.1 SYMPTOMS
19.2 REASON 1 – NO RBS RESPONSE.
19.3 REASON 2 – POOR DOWNLINK QUALITY
19.4 REASON 3 – POOR UPLINK QUALITY
19.5 REASON 4 – UE TRANSMITS WRONG CONTENTS IN THE MESSAGE.
19.6 REASON 5 – ACTIVE SET UPDATE FAILURE.
19.7 REASON 6 – UPLINK IN-SYNCHRONIZATION AT HANDOVER
19.8 REASON 7 – DOWNLINK IN-SYNCHRONIZATION AT HANDOVER
20 HIGH ACTIVE SET UPDATE RATE
20.1 SYMPTOMS.
20.2 REASON 1 – PING-PONG CAUSED DUE TO IMPROPER HANDOVER PARAMETER SETTINGS.
20.3 REASON 2 – PILOT POLLUTION IN DEDICATED MODE.
20.4 REASON 3 – MANY UNNECESSARY HANDOVER RELATIONSHIPS.
21 NO SUITABLE CELL.
21.1 SYMPTOM.
21.2 REASON – HIGH RESTRICTION ON CELL (RE)-SELECTION PARAMETERS
22 CELL RE-SELECTION FAILURE - UE IN IDLE OR CELL_FACH MODE.
22.1 SYMPTOMS.
22.2 REASON 1 - INCORRECT CELL RE-SELECTION SERIES.
22.3 REASON 2 - MISSING NEIGHBORING RELATIONSHIP.
22.4 REASON 3 – PILOT POLLUTION IN IDLE OR CELL_FACH MODE.
22.5 REASON 4 – IMPROPER CELL RE-SELECTION OFFSET SETTING
23 RANDOM ACCESS PROCEDURE PROBLEM
23.1 SYMPTOMS.
23.2 REASON 1 – IMPROPER PARAMETER SETTINGS FOR POWER RAMPING ON RACH
23.3 REASON 2 – PRACH AND PILOT COVERAGE IMBALANCE
23.4 REASON 3 – INSUFFICIENT AICH POWER
23.5 REASON 4 – INSUFFICIENT POWER FOR RACH MESSAGE.
24 MANY INTRA-FREQUENCY CELL RE-SELECTIONS
24.1 SYMPTOMS.
24.2 REASON 1 – IMPROPER RE-SELECTION HYSTERESIS SETTING.
24.3 REASON 2 – INCONSISTENT CELL RE-SELECTION OFFSET SETTING.
25 MANY INTER-FREQUENCY CELL RE-SELECTIONS
25.1 SYMPTOMS.
25.2 REASON – PING-PONG IN INTER-FREQUENCY CELL RE-SELECTIONS
26 UPLINK DEDICATED RADIO LINK SYNCHRONIZATION FAILURE – CALL SETUP
26.1 SYMPTOMS.
26.2 REASON 1 – IMPROPER CELL RE-SELECTION OFFSET SETTING
26.3 REASON 2 – INCORRECT INITIAL POWER CALCULATION FOR DEDICATED CHANNEL..50
26.4 REASON 3 - UPLINK AND DOWNLINK COVERAGE IMBALANCE..51
27 DOWNLINK DEDICATED RADIO LINK SYNCHRONIZATION FAILURE – CALL SETUP..52
27.1 SYMPTOMS..52
27.2 REASON 1 – IMPROPER BACKOFF CONSTANT SETTING..52
27.3 REASON 2 – IMPROPER CELL RE-SELECTION OFFSET SETTING52
27.4 REASON 3 - INTENDED DL DPCH AND PILOT COVERAGE IMBALANCE.53
27.5 REASON 4 - TOO LOW INITIAL DOWNLINK SIR TARGET53
28 POOR QUALITY IN UPLINK..54
28.1 SYMPTOMS..54
28.2 REASON 1 – PILOT CHANNEL FAILURE54
28.3 REASON 2 – POOR QUALITY IN DOWNLINK..54
28.4 REASON 3 - UPLINK AND PILOT COVERAGE IMBALANCE..54
29 POOR QUALITY IN DOWNLINK.55
29.1 SYMPTOMS..55
29.2 REASON 1 – PILOT CHANNEL FAILURE55
29.3 REASON 2 – TRANSMITTING MAX DL CODE POWER55
29.4 REASON 3 – POOR QUALITY IN UPLINK..55
30 DISCLAIMER.56
Regards//
3 PILOT CHANNEL FAILURE - HIGH DOWNLINK INTERFERENCE
3.1 SYMPTOMS
3.2 REASON 1 – NO DOMINANT CELL
3.3 REASON 2 – DOMINANT INTERFERER
3.4 REASON 3 – LOW BEST SERVING PPILOT/PTOT
4 PILOT CHANNEL FAILURE - OUT OF PILOT COVERAGE
4.1 REASON 1 – LOW PILOT CHANNEL POWER.
5 PILOT POLLUTION
5.1 SYMPTOMS
5.2 REASON – NO DOMINANT CELL
6 UPLINK AND PILOT COVERAGE IMBALANCE
6.1 SYMPTOMS
6.2 REASON 1 – LARGE PILOT CHANNEL POWER
6.3 REASON 2 – HIGH UE TX POWER RESTRICTION
7 TRANSMITTING MAX DL CODE POWER – FULL COVERAGE
7.1 SYMPTOMS
7.2 REASON – LOW MAXIMUM ALLOWED DL CODE POWER
8 TRANSMITTING MAX DL CODE POWER – NOT FULL COVERAGE
8.1 SYMPTOMS
8.2 REASON – DOWNLINK POWER DRIFT
9 INSUFFICIENT RECEIVED UL DPCH POWER
9.1 SYMPTOMS
9.2 REASON – LOW MAXIMUM ALLOWED UL SIR TARGET
10 RAPIDLY CHANGING RADIO ENVIRONMENT
10.1 REASON – UL OUTER LOOP POWER CONTROL PROBLEM
11 UNEVEN LOAD DISTRIBUTION
11.1 REASON 1 – HOMOGENOUS PILOT SETTING IN AN IRREGULAR NETWORK
11.2 REASON 2 – UNWANTED LARGE CELL COVERAGE
11.3 REASON 3 – UNEVEN PILOT POWER
12 HIGH DOWNLINK TX POWER.
12.1 SYMPTOMS.
12.2 REASON – MANY USERS IN SOFT/SOFTER HANDOVER.
13 HIGH UPLINK RSSI
13.1 SYMPTOMS.
13.2 REASON – HIGH MINIMUM ALLOWED UL SIR TARGET.
14 MANY DOWN-SWITCHES DUE TO COVERAGE TRIGGERING.
14.1 SYMPTOMS.
14.2 REASON – DOWNLINK DPCH AND PILOT COVERAGE IMBALANCE.
15 HIGH FACH USAGE
15.1 SYMPTOMS.
15.2 REASON 1 – IMPROPER UP-SWITCH THRESHOLDS.
15.3 REASON 2 - IMPROPER DOWN-SWITCH TIMER SETTING.
16 HIGH SWITCHING RATES BETWEEN DEDICATED AND COMMON CHANNELS
16.1 SYMPTOMS.
16.2 REASON 1 - IMPROPER UP-SWITCH THRESHOLDS.
16.3 REASON 2 - IMPROPER DOWN-SWITCH THRESHOLD
17 LOW DATA THROUGHPUT.
17.1 SYMPTOMS..
17.2 REASON 1 – POOR RADIO LINK QUALITIES
17.3 REASON 2 – MANY DOWN-SWITCHES DUE TO COVERAGE TRIGGERING
17.4 REASON 3 - HIGH FACH USAGE
17.5 REASON 4 - HIGH SWITCHING RATES BETWEEN DEDICATED AND COMMON CHANNELS.
18 HANDOVER EVENT DETECTION FAILURE.
18.1 REASON 1 – POOR UPLINK QUALITY
18.2 REASON 2 – INCORRECT HANDOVER SERIES
18.3 REASON 3 - MISSING NEIGHBORING RELATIONSHIP.
18.4 REASON 4 – IMPROPER CELL INDIVIDUAL OFFSET SETTING.
18.5 REASON 5 – SMALL SOFT HANDOVER AREA
19 HANDOVER FUNCTION FAILURE
19.1 SYMPTOMS
19.2 REASON 1 – NO RBS RESPONSE.
19.3 REASON 2 – POOR DOWNLINK QUALITY
19.4 REASON 3 – POOR UPLINK QUALITY
19.5 REASON 4 – UE TRANSMITS WRONG CONTENTS IN THE MESSAGE.
19.6 REASON 5 – ACTIVE SET UPDATE FAILURE.
19.7 REASON 6 – UPLINK IN-SYNCHRONIZATION AT HANDOVER
19.8 REASON 7 – DOWNLINK IN-SYNCHRONIZATION AT HANDOVER
20 HIGH ACTIVE SET UPDATE RATE
20.1 SYMPTOMS.
20.2 REASON 1 – PING-PONG CAUSED DUE TO IMPROPER HANDOVER PARAMETER SETTINGS.
20.3 REASON 2 – PILOT POLLUTION IN DEDICATED MODE.
20.4 REASON 3 – MANY UNNECESSARY HANDOVER RELATIONSHIPS.
21 NO SUITABLE CELL.
21.1 SYMPTOM.
21.2 REASON – HIGH RESTRICTION ON CELL (RE)-SELECTION PARAMETERS
22 CELL RE-SELECTION FAILURE - UE IN IDLE OR CELL_FACH MODE.
22.1 SYMPTOMS.
22.2 REASON 1 - INCORRECT CELL RE-SELECTION SERIES.
22.3 REASON 2 - MISSING NEIGHBORING RELATIONSHIP.
22.4 REASON 3 – PILOT POLLUTION IN IDLE OR CELL_FACH MODE.
22.5 REASON 4 – IMPROPER CELL RE-SELECTION OFFSET SETTING
23 RANDOM ACCESS PROCEDURE PROBLEM
23.1 SYMPTOMS.
23.2 REASON 1 – IMPROPER PARAMETER SETTINGS FOR POWER RAMPING ON RACH
23.3 REASON 2 – PRACH AND PILOT COVERAGE IMBALANCE
23.4 REASON 3 – INSUFFICIENT AICH POWER
23.5 REASON 4 – INSUFFICIENT POWER FOR RACH MESSAGE.
24 MANY INTRA-FREQUENCY CELL RE-SELECTIONS
24.1 SYMPTOMS.
24.2 REASON 1 – IMPROPER RE-SELECTION HYSTERESIS SETTING.
24.3 REASON 2 – INCONSISTENT CELL RE-SELECTION OFFSET SETTING.
25 MANY INTER-FREQUENCY CELL RE-SELECTIONS
25.1 SYMPTOMS.
25.2 REASON – PING-PONG IN INTER-FREQUENCY CELL RE-SELECTIONS
26 UPLINK DEDICATED RADIO LINK SYNCHRONIZATION FAILURE – CALL SETUP
26.1 SYMPTOMS.
26.2 REASON 1 – IMPROPER CELL RE-SELECTION OFFSET SETTING
26.3 REASON 2 – INCORRECT INITIAL POWER CALCULATION FOR DEDICATED CHANNEL..50
26.4 REASON 3 - UPLINK AND DOWNLINK COVERAGE IMBALANCE..51
27 DOWNLINK DEDICATED RADIO LINK SYNCHRONIZATION FAILURE – CALL SETUP..52
27.1 SYMPTOMS..52
27.2 REASON 1 – IMPROPER BACKOFF CONSTANT SETTING..52
27.3 REASON 2 – IMPROPER CELL RE-SELECTION OFFSET SETTING52
27.4 REASON 3 - INTENDED DL DPCH AND PILOT COVERAGE IMBALANCE.53
27.5 REASON 4 - TOO LOW INITIAL DOWNLINK SIR TARGET53
28 POOR QUALITY IN UPLINK..54
28.1 SYMPTOMS..54
28.2 REASON 1 – PILOT CHANNEL FAILURE54
28.3 REASON 2 – POOR QUALITY IN DOWNLINK..54
28.4 REASON 3 - UPLINK AND PILOT COVERAGE IMBALANCE..54
29 POOR QUALITY IN DOWNLINK.55
29.1 SYMPTOMS..55
29.2 REASON 1 – PILOT CHANNEL FAILURE55
29.3 REASON 2 – TRANSMITTING MAX DL CODE POWER55
29.4 REASON 3 – POOR QUALITY IN UPLINK..55
30 DISCLAIMER.56
Regards//